function broadcast(componentName, eventName, params){
    this.$children.forEach(child => {
        const { name  } = child.$options;
        if(name === componentName){
            child.$emit.apply(child, [eventName].concat(params))
        } else {
            broadcast.apply(child, [componentName, eventName].concat(params))
        }
    })
}

export default {
    methods: {
        dispatch(componentName, eventName, params){
            let parent = this.$parent || this.$root;
            let name = parent.$options.name;

            while(parent && (!name || name !== componentName)){
                parent = parent.$parent;
                if(parent){
                    name = parent.$options.name;
                }
            }
            if(parent){
                parent.$emit.apply(parent, [eventName].concat(params))
            }
        },
        broadcast(componentName, eventName, params){
            broadcast.call(this, componentName, eventName, params)
        }
    }
}